The density of river crossing channels is insufficient, and the cross-strait communication still needs to be strengthened
Are there enough bridges on both sides of the Yangtze River and in the South China River Delta? In the opinion of Ni pengpeng, professor and doctoral supervisor of School of civil engineering of Sun Yat sen University, it is not enough!
Throughout the worlds famous economic belt along the river, there are 36 channels along the Seine River in Paris, and the channel spacing in the central area is about 0.35 km; there are 42 channels in the Thames River in London, and the channel spacing in the central area is about 0.5 km; there are 31 channels on the Huangpu River in Shanghai, and the channel spacing in the central area is about 1 km; there are 18 channels in the Pearl River in Guangzhou, and the current channel spacing in the central area is about 2.1 km, and the connecting channels on both sides of the river need to be added Strong!
Ni pengpeng said: South China Bridge and Dongpu bridge are high-speed road bridges, and the main solution is transit traffic; the remaining three municipal bridges are also seriously congested. It is very necessary to plan and build a new river crossing channel.
According to the published regional plans, eight river crossing tunnels are planned to be built between Guangzhou Bridge and Huangpu Bridge. From west to East, they are Xiancun road tunnel, Linjiang Avenue Yuejiang road tunnel, mice West tunnel, exhibition East Tunnel, chebei tunnel, Pazhou East Tunnel, yupa tunnel and Yuzhu tunnel. Among them, chebei road tunnel (chebei road Xinjiao East Road) is under construction, Xiancun road Guangchang East Road River crossing tunnel, Linjiang Avenue Yuejiang road river crossing tunnel and yupa tunnel have completed stage survey and design bidding; mice West tunnel, exhibition East Tunnel and Pazhou East Tunnel are in the previous stage of research.
Planning Tunnel Group
Residents along the line are expected to cross the river nearby without detour
People living on both sides of the Pearl River are deeply touched by the congestion of the river crossing bridge. Mr. Zhang, who works in Yuejiang Road, told reporters: I have to pass the Liede Bridge when I go to work. Its very difficult to get on and off the bridge in the morning and evening. Sometimes its 20 minutes to get on the bridge and 20 minutes to get off the bridge, which is longer than the time spent on the road.
According to the survey, there are about 900000 people working across the Pearl River every day in Guangzhou, including 520000 in the south. At present, the traffic volume of 5 bridges from Guangzhou Bridge to Dongpu bridge has reached saturation. Problems such as too much bridge crossing, too far detour distance, too many traffic lights and too crowded subway have been troubling commuters who travel between the two sides of the Strait every day.
In this regard, Ni pengpeng analyzed that: there are navigation requirements in the front channel of the Pearl River, and the river crossing bridges are built relatively high, which results in long approach bridges, large space occupied by ramps, and long detour distance for citizens to get on and off the bridge, which is easy to cause traffic congestion.
Ni pengpeng said that the excavation depth of the river crossing tunnel is not very deep, and the approach road required is not very long, which makes it easier to organize traffic and more suitable for the river crossing needs of the central urban area of the city. For example, in recent years, it has been made clear in Shanghais planning that tunnels should be built for all the channels crossing the Huangpu River. High density, small-scale tunnel group is more conducive to traffic diversion, to solve the travel of residents along the river. Residents along the line can choose to cross the river nearby without detour. A group of tunnels will be planned between long-distance river crossing channels such as Guangzhou Bridge, Liede Bridge, South China Bridge and Pazhou Bridge, which will meet the travel demand in the area near the river on both sides of the river.
So, will river crossing tunnels cause environmental problems such as noise and vibration? According to Ni pengpeng, according to the current design scheme, these tunnels are not large capacity tunnels, which will restrict the passage of large trucks and speed limit. In addition, the tunnels are buried underground, and their structure determines that the noise and vibration generated by tunnels will be smaller than that of bridges.